Elevator control apparatus

An elevator control apparatus comprising:

• a converter for rectifying AC power into DC power;
• an inverter for converting the DC power into AC power of a variable voltage and a variable frequency;
• a controller for controlling a motor based on the AC power of the variable voltage and the variable frequency so as to operate an elevator;
• a power storage unit for storing the DC power;
• a charge/discharge control circuit that issues a drive signal for controlling charge current to a predetermined constant current value when charging the power storage unit with regenerative electric power if a charge state of the power storage unit indicates a predetermined value or more immediately following completion of uniform charging;
• and
• a charge/discharge circuit for charging the power storage unit with the regenerative electric power in accordance with the drive signal.

An elevator control apparatus comprising:

• a converter for rectifying AC power into DC power;
• an inverter for converting the DC power into AC power of a variable voltage and a variable frequency;
• a controller for controlling a motor based on the AC power of the variable voltage and the variable frequency so as to operate an elevator;
• a power storage unit for storing the DC power;
• a charge/discharge control circuit that issues a drive signal for starting uniform charging of the power storage unit at a preset time when the elevator is least frequently used;
• and
• a charge/discharge circuit for starting the uniform charging of the power storage unit in accordance with the drive signal.

An elevator control apparatus comprising:

• a converter for rectifying AC power into DC power;
• an inverter for converting the DC power into AC power of a variable voltage and a variable frequency;
• a controller for controlling a motor based on the AC power of the variable voltage and the variable frequency so as to operate an elevator;
• a power storage unit for storing the DC power;
• a charge/discharge control circuit that issues a drive signal for performing uniform charging of the power storage unit during a halt of the elevator based on information regarding an elevator operation supplied by the controller, measures a time of the uniform charging by a timer, issues a drive signal for interrupting the uniform charging and stopping the timer when the elevator is being started, totalizes an amount of discharge from the power storage unit up to that moment, and, when the elevator is stopped again, issues a drive signal for correcting a charging time corresponding to the totalized amount of discharge based on the uniform charging time measured by the timer before restarting the uniform charging, and also restarts measurement of uniform charging time by the timer;
• and
• a charge/discharge circuit for starting or interrupting uniform charging of the power storage unit in accordance with the drive signals.

An elevator control apparatus comprising:

• a converter for rectifying AC power into DC power;
• an inverter for converting the DC power into AC power of a variable voltage and a variable frequency;
• a controller for controlling a motor based on the AC power of the variable voltage and the variable frequency so as to operate an elevator;
• a power storage unit for storing the DC power;
• a charge/discharge control circuit that issues a drive signal for starting uniform charging of the power storage unit when a preset two or more days have passed from a day when previous uniform charging was started;
• and
• a charge/discharge circuit that starts uniform charging of the power storage unit in accordance with the drive signal.

An elevator control apparatus comprising:

• a converter for rectifying AC power into DC power;
• an inverter for converting the DC power into AC power of a variable voltage and a variable frequency;
• a controller for controlling a motor based on the AC power of the variable voltage and the variable frequency so as to operate an elevator;
• a power storage unit for storing the DC power;
• a charge/discharge circuit for charging the power storage unit and causing the power storage unit to discharge according to a drive signal;
• and
• a charge/discharge control circuit that controls a charge state of the power storage unit and outputs a drive signal for charging the power storage unit or causing the power storage unit to discharge, and changes a set application range of the charge state of the power storage unit based on an open circuit voltage of the power storage unit immediately following completion of uniform charge.

An elevator control apparatus comprising:

• a converter for rectifying AC power into DC power;
• an inverter for converting the DC power into AC power of a variable voltage and a variable frequency;
• a controller for controlling a motor based on the AC power of the variable voltage and the variable frequency so as to operate an elevator;
• a power storage unit for storing the DC power;
• a charge/discharge circuit for charging the power storage unit and causing the power storage unit to discharge according to a drive signal;
• and
• a charge/discharge control circuit that controls a charge state of the power storage unit and outputs a drive signal for charging the power storage unit or causing the power storage unit to discharge, and corrects the charge state immediately following completion of uniform charge of the power storage unit.

An elevator control apparatus comprising:

• a converter for rectifying AC power into DC power;
• an inverter for converting the DC power into AC power of a variable voltage and a variable frequency;
• a controller for controlling a motor based on the AC power of the variable voltage and the variable frequency so as to operate an elevator;
• a power storage unit for storing the DC power;
• a charge/discharge circuit for charging the power storage unit and causing the power storage unit to discharge according to a drive signal;
• and
• a charge/discharge control circuit that controls a charge state of the power storage unit and outputs a drive signal for charging the power storage unit or causing the power storage unit to discharge, performs uniform charging of the power storage unit at constant current in a plurality of steps, and maintains the charge state of the power storage unit at 100%, if a charge state of the power storage unit exceeds 100%, until discharge from the power storage unit is carried out even when more than 100% charging is performed.

An elevator control apparatus comprising:

• a converter for rectifying AC power into DC power;
• an inverter for converting the DC power into AC power of a variable voltage and a variable frequency;
• a controller for controlling a motor based on the AC power of the variable voltage and the variable frequency so as to operate an elevator;
• a power storage unit for storing the DC power;
• a charge/discharge circuit for charging the power storage unit and causing the power storage unit to discharge according to a drive signal;
• and
• a charge/discharge control circuit that controls a charge state of the power storage unit and outputs a drive signal for charging the power storage unit or causing the power storage unit to discharge, calculates a current value that is uniquely determined relative to a value obtained by detecting a charge current supplied to the power storage unit, a DC bus voltage output by the converter, and a voltage of the power storage unit, and a charge current command value so as to provide a command value, and PWM-controls the charge/discharge circuit thereby to control the charge current supplied to the power storage unit by using the command value.